feat: implement live-sync for tasks, workspace note sharing, and document locking system

internal/domain/models.go

@@ -221,6 +221,24 @@ type DocumentBlock struct {
 	Collapsed bool   `json:"collapsed,omitempty"`
 }
 
+type DocShare struct {
+	ID          string `json:"id"`
+	DocID       string `json:"docId"`
+	UserID      string `json:"userId"`
+	UserEmail   string `json:"userEmail,omitempty"`
+	DisplayName string `json:"displayName,omitempty"`
+	Permission  string `json:"permission"` // read | write
+	CreatedBy   string `json:"createdBy"`
+	CreatedAt   string `json:"createdAt"`
+}
+
+type DocLockInfo struct {
+	DocID     string `json:"docId"`
+	UserID    string `json:"userId"`
+	UserName  string `json:"userName"`
+	ExpiresAt string `json:"expiresAt"`
+}
+
 type Document struct {
 	ID         string          `json:"id"`
 	UserID     string          `json:"userId"`
@@ -235,6 +253,12 @@ type Document struct {
 	IsArchived bool            `json:"isArchived"`
 	CreatedAt  string          `json:"createdAt"`
 	UpdatedAt  string          `json:"updatedAt"`
+
+	// Collaboration & Permissions
+	Permission string     `json:"permission"` // owner | write | read
+	IsOwner    bool       `json:"isOwner"`
+	OwnerName  string     `json:"ownerName,omitempty"`
+	SharedWith []DocShare `json:"sharedWith,omitempty"`
 }
 
 type SpaceMember struct {